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Sound Waves Characteristics and Applications — Flashcards

CBSE · Class 9 · Science

80 flashcards for Sound Waves Characteristics and Applications (CBSE Class 9 Science) to test yourself on key terms and facts.

77 questions80 flashcards5 formulas & key relations5 concepts

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An illustration showing a block being pulled by a constant force F at an angle theta to the horizontal displacement S, with the formula W = F ⋅ S = FS cosθ.
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80 Flashcards·
Production of Soundध्वनि का उत्पादन
Card 1Production of Sound

Why is sound produced when a stretched rubber band is plucked?

Answer

Sound is produced by vibrations. When the rubber band vibrates, it disturbs the surrounding air and creates sound. When the vibrations stop, the sound also stops.

Card 2ध्वनि का उत्पादन

जब एक खिंचे हुए रबर बैंड को झंकना पड़ता है तो ध्वनि क्यों उत्पन्न होती है?

Answer

ध्वनि कंपन से उत्पन्न होती है। रबर बैंड के कंपन करने पर उसके आसपास की हवा में कंपन होता है और ध्वनि उत्पन्न होती है। कंपन रुकने पर ध्वनि भी रुक जाती है।…

Card 3ध्वनि का उत्पादन

कंपन क्या है?

Answer

कंपन किसी वस्तु की आवधिक आगे-पीछे की गति है। कई ध्वनि स्रोत, जैसे कि तार, झिल्ली और स्वर रज्जु, कंपन करके ध्वनि उत्पन्न करते हैं।…

Card 4Production of Sound

What is vibration?

Answer

Vibration is the periodic to and fro motion of an object. Many sound sources, such as strings, membranes, and vocal cords, produce sound by vibrating.

Card 5Production of Sound

How do vocal cords produce sound in humans?

Answer

Vocal cords are tightly stretched muscular flaps inside the voice box or larynx. When they vibrate, they produce sound. In boys, the vocal cords lengthen and thicken during adolescence, which lowers t…

Card 6ध्वनि का उत्पादन

मनुष्यों में स्वर रज्जु ध्वनि कैसे उत्पन्न करते हैं?

Answer

स्वर रज्जु (vocal cords) स्वरयंत्र या स्वरकोष के अन्दर की कड़ी तनी हुई पेशीय पट्टियाँ होती हैं। इनके कम्पन से ध्वनि उत्पन्न होती है। लड़कों में किशोरावस्था में स्वर रज्जु लम्बी और मोटी हो जाती है जिसस…

Card 7ध्वनि का उत्पादन

ट्यूनिंग फोर्क क्या है और इसका उपयोग कैसे किया जाता है?

Answer

स्वरयंत्र (tuning fork) एक U आकार की धातु की छड़ होती है जिसका एक डंठल होता है। यह प्रायः इस्पात या अल्युमिनियम से बना होता है। इसके प्रोंग को एक रबर पैड पर मारा जाता है जिससे यह कंपन करता है और लगभग …

Card 8Production of Sound

What is a tuning fork and how is it used?

Answer

A tuning fork is a U-shaped metal bar with a stem, usually made of steel or aluminium. Its prongs are struck on a rubber pad to make it vibrate and produce nearly single-frequency sound.

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Frequently Asked Questions

What are the important topics in Sound Waves Characteristics and Applications for CBSE Class 9 Science?
Key topics in Sound Waves Characteristics and Applications include Production and Propagation of Sound, Wave Nature, Energy, and Graphical Terms, Speed of Sound and Its Dependence on Medium, Human Hearing, Pitch, Loudness, and Voice. Study these first, then practise questions on each for Class 9 exams.
How many flashcards are available for Sound Waves Characteristics and Applications?
There are 80 flashcards for Sound Waves Characteristics and Applications covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Sound Waves Characteristics and Applications for Class 9 exams?
Learn the core ideas first, then work through the 77 practice questions on Sound Waves Characteristics and Applications. Revise definitions regularly and use flashcards for quick recall before the exam.

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